Hearthstone on Twitter: "The #Boomsday Project's challenging single-player experience, The Puzzle Lab, is now live! Log in now to receive 3 The Boomsday Project card packs for free! 💥 https://t.co/J58FVG6EPY https://t.co/N3IGxyptHS" /
Solution Puzzle Lab Mirror: Three Odd Yetis - Test Subject (8/8), Hearthstone Boomsday [UPDATED] - YouTube
Hearthstone's Puzzle Lab Is a Great Reason to Play Hearthstone Again, Just Not in Multiplayer | Gadgets 360